Silverado Coolant Leak- EVAP Pressure Sensor Location

Question:
My truck started leaking radiator fluid...not from the radiator, but further back towards the back of the engine. Can you diagnose this problem for me? Problem with my 2001 Chevy Silverado 1500. 5.3 L V8. New radiator 1 year ago.

Answer:
As with any vehicle, a coolant / antifreeze leak needs to looked at carefully to diagnose where the leak is coming from. Many things can cause a coolant leak. From basic problems like a leaking hose, loose clamp, water pump, to more serious like intake manifold gaskets, or a freeze plug. Have a mechanic do a pressure test on the system to find the source of the leak.

Question:
The heater hose under the dash is leaking into the floorboard. Is this a hard fix? 1993 chevy 1500 truck.

Answer:
There should not be any coolant hose under the dash. It almost sounds like somebody added the hose there for some reason. Maybe you are seeing a leak from the heater core. If that is the problem, then this is a big job. The dash needs to come out of the truck.

Question:
Problem with my 2005 Chevy Silverado LS. 5.3 liter Vortec V8. Check Engine light. GM Computer codes = EVAP Sensor. Where is the EVAP sensor on a 2005 Chevy Silverado? How do I reset or change it out?

Answer:
See picture below. If you are referring to the EVAP Fuel Tank Pressure Sensor, this is located on top of the fuel tank, on the fuel pump module. The tank will either need to be removed, or lowered to gain access to it. It has 1 electrical connector, and snaps into the fuel pump module assembly. See picture below. This is from the top of the fuel tank.

Question:
About every month or 2 I have to top off the coolant level (1/4 - 1/2 a gallon)so there is a slow leak or burning of the coolant somewhere. As stated above, In Aug I replaced the radiator, The hoses, and the coolant overflow bucket. I hear it may be one of the gaskets somewhere, but I have no idea just looking for a better answer. 2001 Chevy Silverado 1500 V8 4.8L Vortec. Repairs for this problem: New Radiator, hoses, and coolant overflow bucket.

Answer:
Unless you can actually see a leak, such as the water pump, on the ground or running down the engine, then you are losing the coolant internally. Adding that much, that often means there is definitely a problem somewhere. You could have a cylinder head gasket that is split and letting coolant get into the cylinders, which would be burned off during combustion.

If you can see white smoke coming out the exhaust while the engine is running at operating temperature, you are for sure burning it in the cylinders. The coolant could also be getting into the oil, so you would want to check the oil level on the dipstick to see if it is high or discolored or smells like coolant.

Most likely, you've got a small leak internally on one or both of the cylinder heads. If the truck has a lot of miles, it would benefit to do both heads at the same time and not just one.